CVE-2016-9909

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Summary

CVECVE-2016-9909
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-02-22 16:59:00 UTC
Updated2025-04-20 01:37:25 UTC
DescriptionThe serializer in html5lib before 0.99999999 might allow remote attackers to conduct cross-site scripting (XSS) attacks by leveraging mishandling of the < (less than) character in attribute values.

Risk And Classification

Primary CVSS: v3.0 6.1 MEDIUM from [email protected]

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem Types: CWE-79 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary6.1MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.0[email protected]Primary4.3AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:N/AC:M/Au:N/C:N/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Html5lib Html5lib All 1.0b8 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
oss-security - Re: CVE Request: html5lib: potential cross-site scripting vulnerablity: quote attributes that need escaping in legacy browsers af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Patch, Third Party Advisory
oss-security - CVE Request: html5lib: potential cross-site scripting vulnerablity: quote attributes that need escaping in legacy browsers af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Patch, Third Party Advisory
Quote attributes containing weird whitespace or '<' · Issue #11 · html5lib/html5lib-python · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Vendor Advisory
Fix #11, #12: quote attributes that need escaping in legacy browsers · html5lib/html5lib-python@9b8d8eb · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch
Change Log — html5lib 0.9999999999-dev documentation af854a3a-2127-422b-91ae-364da2661108 html5lib.readthedocs.io Release Notes
Possible to make IE run script after roundtripping in html5lib · Issue #12 · html5lib/html5lib-python · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Vendor Advisory
html5lib Multiple Cross Site Scripting Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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